Treo 680 doesn’t have WiFi but you can add it with the latest beta of the Enfora WiFi Manager customly installed on to it

The Enfora® Wi-Fi® Adapter for the Treo 650 allows Treo 650 smartphone users to access Wi-Fi networks (including hotspots) to surf the Internet, send and receive email, and wirelessly synchronize their Treo smartphone at high speeds…it happens to work on 680 too

It also includes WEP encryption, and an internal long life battery that does not draw power from the Treo smartphone.

The Enfora Wi-Fi Adapter ships with a 5 volt power supply and the Enfora Wi-Fi management/setup CD. When the adapter is attached to the Treo smartphone, the power supply will charge both devices simultaneously.

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